This week Rūma Weka got their hands delightfully messy exploring the amazing properties of a substance called Oobleck!
Oobleck is made from just cornflour and water, but it gave us a huge science surprise! The students noticed that this gooey material is a real shape-shifter.
Solid vs. Liquid: The Great Mystery

When the tamariki applied quick, strong pressure—like punching it or rolling it fast—the Oobleck would turn hard! It felt like a solid ball or clay, and they could even walk across a tray of it very quickly!
But the moment they relaxed, or tried to move their fingers slowly through it, the Oobleck instantly turned back into a runny liquid and dripped away!
The Science Behind the Magic
Oobleck is a fantastic example of what scientists call a Non-Newtonian Fluid. Most liquids, like water, are Newtonian—they always flow the same way. But a Non-Newtonian Fluid is special because its state (solid or liquid) changes depending on the force or pressure we put on it.
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Fast Force (Pressure): Squeezes the cornflour particles together, trapping the water and making it act like a solid.
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Slow Force (Relaxing): Allows the particles to slide past each other, making it act like a liquid.
This hands-on experiment was a wonderful way to explore the Science curriculum, where we focus on “Exploring the properties of materials and how they can be changed.” We learned that not all materials follow the rules we expect, and sometimes, the best way to understand them is to get messy and experiment!